She notes having spent many hours watching Jones -- doing the dirty work so that you don't have to -- as he rants and raves over a range of conspiracy theories, and is therefore able to put them in perspective. As she says, too, under normal circumstances it wouldn't matter what Jones says, but since Trump has bizarrely pointed to InfoWars as a source of "information," that makes normalizing Jones' craziness to a larger pubic a risk.
It's not so much that Ms. Belluz doesn't think that Jones' should be reported on, but that this sit-down interview is the wrong format for it.
You can read it here.